@article{bykhovski_zhang_jensen_woolard_2013, title={Analysis of Electronic Structure, Binding, and Vibrations in Biotin-Streptavidin Complexes Based on Density Functional Theory and Molecular Mechanics}, volume={117}, ISSN={["1520-6106"]}, DOI={10.1021/jp3075833}, abstractNote={In this work, the biotin-streptavidin complex was studied with density functional theory (DFT), molecular mechanical methods (MM), and a hybrid DFT/MM approach in order to obtain the theoretical predictions for electronic structures, binding, optical transitions, harmonic vibrations, and absorption spectra. It was demonstrated that biotin solvation in water can reduce the binding strength to streptavidin by more than half. All studied properties, including the biotin binding and the UV absorption of the biotin-streptavidin complex, are predicted to be protonation state dependent. The absorption edge of the complex calculated with TDDFT/MM was found to be virtually insensitive to the choice of the MM force field and strongly dependent on the type of embedding of the DFT partition. Both UV and terahertz light absorption spectra are predicted to be sensitive to the presence of biotin in the streptavidin tetramer.}, number={1}, journal={JOURNAL OF PHYSICAL CHEMISTRY B}, author={Bykhovski, Alexei and Zhang, Weidong and Jensen, James and Woolard, Dwight}, year={2013}, month={Jan}, pages={25–37} }
 @article{zhang_brown_rahman_norton_2013, title={Observation of terahertz absorption signatures in microliter DNA solutions}, volume={102}, number={2}, journal={Applied Physics Letters}, author={Zhang, W. and Brown, E. R. and Rahman, M. and Norton, M. L.}, year={2013} }
 @article{zhang_woolard_2011, title={Far-infrared and terahertz lasing based upon resonant and interband tunneling in InAs/GaSb heterostructures}, volume={98}, number={20}, journal={Applied Physics Letters}, author={Zhang, W. D. and Woolard, D. L.}, year={2011} }
 @article{zhang_woolard_2010, title={InAs/GaSb broken-gap heterostructure laser for terahertz spectroscopic sensing application}, volume={9}, number={5}, journal={IEEE Transactions on Nanotechnology}, author={Zhang, W. D. and Woolard, D. L.}, year={2010}, pages={575–581} }
 @article{zhang_woolard_2008, title={Magneto-transport physics in superlattices with staggered-bandgap structure}, volume={8}, ISSN={["1530-437X"]}, DOI={10.1109/JSEN.2008.922722}, abstractNote={Physical models are presented to describe magneto-transports within double-barrier structure with staggered-band lineups. Here, a special case, where the magnetic field is perpendicular to the heterolayers, is considered and the conduction-band electron current is calculated. In addition, the spatial charge transfer due to the heavyhole (HH) interband tunneling is also studied. The interband tunneling probability is related to the Landau index number, which characterizes the quantization of in-plane electron motions. As a consequence, the inversion of hole populations between Landau levels is shown to occur which is a new phenomenon that has relevance for millimeterwave amplification.}, number={5-6}, journal={IEEE SENSORS JOURNAL}, author={Zhang, Weidong and Woolard, Dwight L.}, year={2008}, pages={914–921} }
 @inproceedings{zhang_woolard_zhao_2007, title={A Spin-Polarized interband-current source based upon staggered-bandgap heterostructures}, ISBN={978-1-4244-0607-4}, booktitle={2007 7TH IEEE CONFERENCE ON NANOTECHNOLOGY}, publisher={[Piscataway, NJ]: IEEE}, author={Zhang, W. D. and Woolard, D. and Zhao, P.}, year={2007}, pages={214–219} }